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Commit 2aee4723 authored by Prabir Pradhan's avatar Prabir Pradhan
Browse files

PointerLocationView: Reconfigure trace bitmap on display changes 

The pointer trace/trail is drawn on a separate bitmap layer in the
PointerLocationView to avoid having to redraw the trail on each frame.
Whenever the display size changes, like when displayId 0 is remapped
from the internal display to an external display in a foldable device,
the trace bitmap should be reconfigured.

Bug: 407039712
Flag: EXEMPT bug fix
Test: Presubmit
Change-Id: Ifbbff80b83f035657cc88e1a905e55f03d4264bc
parent 3850d545

core/java/com/android/internal/widget/PointerLocationView.java

+28 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ import android.graphics.Path; 
import android.graphics.PorterDuff;

import android.graphics.RectF;

import android.graphics.Region;

import android.hardware.display.DisplayManager;

import android.hardware.input.InputManager;

import android.hardware.input.InputManager.InputDeviceListener;

import android.os.Handler;
@@ -123,6 +124,7 @@ public class PointerLocationView extends View implements InputDeviceListener, 
    }



    private final InputManager mIm;

    private final DisplayManager mDisplayManager;



    private final ViewConfiguration mVC;

    private final Paint mTextPaint;
@@ -170,11 +172,35 @@ public class PointerLocationView extends View implements InputDeviceListener, 


    private float mDensity;



    private final DisplayManager.DisplayListener mDisplayListener =

            new DisplayManager.DisplayListener() {

                @Override

                public void onDisplayAdded(int displayId) {

                    onDisplayChanged(displayId);

                }



                @Override

                public void onDisplayRemoved(int displayId) {



                }



                @Override

                public void onDisplayChanged(int displayId) {

                    if (displayId != mContext.getDisplayId()) {

                        return;

                    }

                    // Reconfigure the trace bitmap whenever there are changes to the display, since

                    // the bitmap depends on display size.

                    configureTraceBitmap();

                }

            };



    public PointerLocationView(Context c) {

        super(c);

        setFocusableInTouchMode(true);



        mIm = c.getSystemService(InputManager.class);

        mDisplayManager = c.getSystemService(DisplayManager.class);



        mVC = ViewConfiguration.get(c);

        mTextPaint = new Paint();
@@ -798,6 +824,7 @@ public class PointerLocationView extends View implements InputDeviceListener, 
        super.onAttachedToWindow();



        mIm.registerInputDeviceListener(this, getHandler());

        mDisplayManager.registerDisplayListener(mDisplayListener, getHandler());

        if (shouldShowSystemGestureExclusion()) {

            try {

                WindowManagerGlobal.getWindowManagerService()
@@ -820,6 +847,7 @@ public class PointerLocationView extends View implements InputDeviceListener, 
        super.onDetachedFromWindow();



        mIm.unregisterInputDeviceListener(this);

        mDisplayManager.unregisterDisplayListener(mDisplayListener);

        try {

            WindowManagerGlobal.getWindowManagerService().unregisterSystemGestureExclusionListener(

                    mSystemGestureExclusionListener, mContext.getDisplayId());